Obtaining 24Vdc supply - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 10-02-2005, 04:04 PM Thread Starter
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Obtaining 24Vdc supply

I have 2 palm size pc fan, which intend to intergrate into a nano tank, like say 1 to 3 gallon tank. But the fan need 24Vdc. Can anyone here advise where to get a step down 24Vdc from main power source? Using batteries may not be that economical.

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post #2 of 5 (permalink) Old 10-02-2005, 05:28 PM
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Quote:
Originally Posted by rollerband
I have 2 palm size pc fan, which intend to intergrate into a nano tank, like say 1 to 3 gallon tank. But the fan need 24Vdc. Can anyone here advise where to get a step down 24Vdc from main power source? Using batteries may not be that economical.
Not much here in the US runs on 24vDC, but then again a lot of folks don't run PC fans at full speed in an effort to keep the noise down. Have you tried to find a universal DC power transformer...one that can be switched through a range of output voltages? Or look for a lower voltage transformer like is used for portable CD players? You won't get full speed out of the fan using one of these, but it still might produce enough airflow, and with a lot less noise.

óBill

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post #3 of 5 (permalink) Old 10-02-2005, 05:58 PM
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I am using the 24 volt transformer and relay from an old furnace in my auto top off for my reef tank.

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Sam
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post #4 of 5 (permalink) Old 10-22-2005, 05:57 AM
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Here are some suppliers of electronic components... Should be able to find a 24vdc supply in there somewhere... Either a switching supply, or a plug-in "wall wart" (the black cube shaped ones that plug in the wall and/or block three outlets on plug strips)... For two small fans I would recommend the wall-wart variety. A switching supply would be wasted.... BUT the final say is the wattage - add up the watts of your fans and get something bigger than that by like 50% for safety sake.

http://www.allelectronics.com
http://www.digikey.com
http://www.mouser.com
http://www.mpja.com
http://www.jameco.com

I have personally used Mouser, Jameco, and DigiKey, and they are all reliable.
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post #5 of 5 (permalink) Old 10-23-2005, 03:03 AM
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Look in an electronic surplus store. In ours there are DC transformers galore. Also, look at the power supply for bigger electronic items such as: printers, notebooks, scanners etc. Good luck!

Steve

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